/* 全局重置 */
* { margin: 0; padding: 0; box-sizing: border-box; }
:root {
    --primary: #0a66c2;            /* 天蓝色主色保持不变 */
    --primary-light: #e8f0fe;      /* 浅蓝背景 */
    --bg-body: #e8eaed;            /* 银灰色页面背景 */
    --surface: #ffffff;            /* 白色卡片保持不变 */
    --text-main: #1e2a3a;          /* 深色文字 */
    --text-secondary: #5a6470;     /* 次级文字调整为金属灰 */
    --border-light: #d0d4d9;       /* 边框颜色加深，适应银灰背景 */
    --shadow-card: 0 15px 30px -10px rgba(0,0,0,0.06); /* 阴影微调 */
    --font-sans: system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
}
body {
    background: var(--bg-body);
    color: var(--text-main);
    font-family: var(--font-sans);
    line-height: 1.5;
}
.container { max-width: 1280px; margin: 0 auto; padding: 0 32px; }

/* 导航 */
.header {
    background: rgba(255,255,255,0.9);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-light);
    position: sticky;
    top: 0;
    z-index: 100;
}
.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 0;
}
.logo {
    font-size: 1.8rem;
    font-weight: 600;
    text-decoration: none;
    color: var(--text-main);
}
.logo span { color: var(--primary); }
.nav-links { display: flex; gap: 2.5rem; }
.nav-links a {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    transition: color 0.15s;
}
.nav-links a:hover { color: var(--primary); }
.menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.8rem;
    cursor: pointer;
}

/* 通用区块 */
.section { padding: 80px 0; }
.section-title {
    font-size: 2.4rem;
    font-weight: 600;
    margin-bottom: 48px;
    border-left: 5px solid var(--primary);
    padding-left: 20px;
}
.bg-light { background: var(--surface); }

/* Hero */
.hero-grid {
    display: flex;
    align-items: center;
    gap: 50px;
    padding: 40px 0;
}
.hero-content h1 {
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 24px;
}
.hero-content p {
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: 32px;
}
.btn {
    display: inline-block;
    background: var(--primary);
    color: white;
    padding: 14px 36px;
    border-radius: 40px;
    font-weight: 600;
    text-decoration: none;
    transition: 0.2s;
}
.btn:hover { background: #0b5bb5; transform: translateY(-2px); }

/* 关于我们 */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
}
.info-card {
    background: var(--surface);
    padding: 30px;
    border-radius: 20px;
    box-shadow: var(--shadow-card);
    border: 1px solid var(--border-light);
}
.info-card p { margin-bottom: 16px; }

/* 产品网格 */
.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 30px;
}
.product-card {
    background: var(--surface);
    border-radius: 20px;
    padding: 32px 24px;
    box-shadow: var(--shadow-card);
    border: 1px solid var(--border-light);
    transition: transform 0.2s;
}
.product-card:hover { transform: translateY(-5px); }
.product-icon { font-size: 2.8rem; margin-bottom: 20px; }
.product-card h3 { margin-bottom: 10px; }
.product-card p { color: var(--text-secondary); }

/* 新闻列表 */
.news-list { display: flex; flex-direction: column; gap: 24px; }
.news-item {
    display: flex;
    flex-wrap: wrap;
    gap: 20px 30px;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--border-light);
}
.news-date {
    color: var(--primary);
    font-weight: 600;
    min-width: 100px;
}
.news-item h3 { margin-bottom: 8px; }

/* 招聘网格 */
.job-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 24px;
}
.job-card {
    background: var(--surface);
    border-radius: 18px;
    padding: 28px;
    box-shadow: var(--shadow-card);
    border: 1px solid var(--border-light);
}
.job-tag {
    display: inline-block;
    background: var(--primary-light);
    color: var(--primary);
    padding: 4px 14px;
    border-radius: 20px;
    font-size: 0.9rem;
    margin-bottom: 16px;
}

/* 底部 */
.footer {
    background: var(--surface);
    padding: 48px 0 30px;
    border-top: 1px solid var(--border-light);
}
.footer-links {
    display: flex;
    flex-wrap: wrap;
    gap: 30px;
    margin-bottom: 30px;
}
.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
}
.footer-info { color: var(--text-secondary); }
.footer-info p { margin-bottom: 10px; }
.beian {
    display: inline-block;
    margin-left: 20px;
}

/* 响应式 */
@media (max-width: 768px) {
    .container { padding: 0 20px; }
    .menu-toggle { display: block; }
    .nav-links {
        display: none;
        width: 100%;
        flex-direction: column;
        gap: 16px;
        padding: 20px 0;
    }
    .nav-links.active { display: flex; }
    .nav-container { flex-wrap: wrap; }
    .hero-grid { flex-direction: column; }
    .hero-content h1 { font-size: 2.5rem; }
    .about-grid { grid-template-columns: 1fr; }
    .section-title { font-size: 2rem; }
}